Water Treatment Chemicals for Pool & Leisure in Namibia

It holds the hardness and metals in solution — dosed at fill and with top-ups, hexametaphosphate-based sequestrant keeps calcium from plating the waterline and iron from staining on oxidation. It does not remove anything; it manages it, which is why the dose renews with the water. On our boreholes it is the difference between maintenance and renovation.

Iron: borehole fill carried dissolved iron invisible until the chlorine shock oxidised it into stain and tint. Sequester first (EDTA or hexametaphosphate at the fill), then sanitise, and the iron stays managed. For an already-stained pool, ascorbic-based stain lifting then immediate sequestering — and treat every future top-up as new iron arriving.

The dead-green recovery: when filtration cannot catch what is suspended, alum dosed correctly drops the entire haze to the floor overnight for vacuuming to waste — faster and cheaper than days of filter cycles on a lodge deadline. It is a reset tool, not a routine: pH management before, patience during, thorough vacuum after.

When the dissolved-solids arithmetic says so: years of evaporation-and-top-up concentrate everything — calcium, stabiliser, salts — until chemistry behaves strangely at any dose. Test TDS and cyanuric acid; past the thresholds, a partial drain-and-refill (with sequestered fresh water) resets the pool more cheaply than fighting it chemically.